Robust Fault Diagnosis for a Class of Linear Systems with Uncertainty

The fault diagnosis problem for a class of uncertain systems is discussed. The systems are transformed into two different subsystems. One is not affected by actuator faults, so the robust observer can be designed under certain conditions. The other whose states can be measured is affected by the faults. The observation scheme is then used for model-based monitoring and failure diagnosis. More specifically, a simple approach for fault detection and isolation (FDI) of actuator faults is presented. Finally, an example of an F16XL aircraft, is used to illustrate the applicability of proposed method.